Kernel/x86 - Indent fixes only

[tpg/acess2.git] / Kernel / arch / x86 / desctab.asm

diff --git a/Kernel/arch/x86/desctab.asm b/Kernel/arch/x86/desctab.asm
index 9d19300..fa7b84b 100644 (file)
--- a/Kernel/arch/x86/desctab.asm
+++ b/Kernel/arch/x86/desctab.asm
@@ -31,7 +31,8 @@ gGDTPtr:
 ALIGN 8
 [global gIDT]
 gIDT:
-       times   256     dd      0x00080000,0x00000F00
+       ; CS = 0x08, Type = 32-bit Interrupt (0xE = 1 110)
+       times   256     dd      0x00080000,0x00000E00
 [global gIDTPtr]
 gIDTPtr:
        dw      256 * 16 - 1    ; Limit
@@ -52,30 +53,47 @@ Desctab_Install:
        jmp 0x08:.pl0code
 .pl0code:
 
-       ; Set IDT
+       ; Set up IDT
+       ; Helper Macros
+       ; - Set an IDT entry to an ISR
 %macro SETISR  1
        mov eax, Isr%1
        mov     WORD [gIDT + %1*8], ax
        shr eax, 16
        mov     WORD [gIDT + %1*8+6], ax
+       ; Enable
        mov     ax, WORD [gIDT + %1*8 + 4]
        or ax, 0x8000
        mov     WORD [gIDT + %1*8 + 4], ax
 %endmacro
-%macro SETUSER 1
-       mov     ax, WORD [gIDT + %1*8 + 4]
-       or ax, 0x6000
-       mov     WORD [gIDT + %1*8 + 4], ax
+       ; Enable user calling of an ISR
+%macro SET_USER        1
+       or WORD [gIDT + %1*8 + 4], 0x6000
+%endmacro
+       ; Set an ISR as a trap (leaves interrupts enabled when invoked)
+%macro SET_TRAP        1
+       or WORD [gIDT + %1*8 + 4], 0x0100
 %endmacro
+
+       ; Error handlers
        %assign i       0
        %rep 32
        SETISR  i
        %assign i i+1
        %endrep
        
+       ; User Syscall
        SETISR  0xAC
-       SETUSER 0xAC
+       SET_USER        0xAC
+       SET_TRAP        0xAC    ; Interruptable
        
+       ; MP ISRs
+       %if USE_MP
+       SETISR  0xEE    ; 0xEE Timer
+       SETISR  0xEF    ; 0xEF Spurious Interrupt
+       %endif
+
+       ; IRQs
        %assign i       0xF0
        %rep 16
        SETISR  i
@@ -90,27 +108,27 @@ Desctab_Install:
        mov dx, 0x20
        mov al, 0x11
        out dx, al      ;       Init Command
-    mov dx, 0x21
+       mov dx, 0x21
        mov al, 0xF0
        out dx, al      ;       Offset (Start of IDT Range)
-    mov al, 0x04
+       mov al, 0x04
        out dx, al      ;       IRQ connected to Slave (00000100b) = IRQ2
-    mov al, 0x01
+       mov al, 0x01
        out dx, al      ;       Set Mode
-    mov al, 0x00
+       mov al, 0x00
        out dx, al      ;       Set Mode
        
        mov dx, 0xA0
        mov al, 0x11
        out dx, al      ;       Init Command
-    mov dx, 0xA1
+       mov dx, 0xA1
        mov al, 0xF8
        out dx, al      ;       Offset (Start of IDT Range)
-    mov al, 0x02
+       mov al, 0x02
        out dx, al      ;       IRQ Line connected to master
-    mov al, 0x01
+       mov al, 0x01
        out dx, al      ;       Set Mode
-    mov dl, 0x00
+       mov dl, 0x00
        out dx, al      ;       Set Mode
        pop edx
        
@@ -130,7 +148,7 @@ Isr%1:
 %macro ISR_NOERR       1
 [global Isr%1]
 Isr%1:
-       xchg bx, bx
+       ;xchg bx, bx
        push    0
        push    %1
        jmp     ErrorCommon
@@ -187,13 +205,37 @@ ISR_NOERR 31; 31: Reserved
 
 DEF_SYSCALL    0xAC    ; Acess System Call
 
+%if USE_MP
+[global Isr0xEE]
+[extern SchedulerBase]
+; AP's Timer Interrupt
+Isr0xEE:
+       push 0  ; Line up with interrupt number
+       xchg bx, bx     ; MAGIC BREAK
+       jmp SchedulerBase
+; Spurious Interrupt
+[global Isr0xEF]
+Isr0xEF:
+       xchg bx, bx     ; MAGIC BREAK
+       iret
+%endif
+
 ; IRQs
 ; - Timer
 [global Isr240]
+[global Isr240.jmp]
 [extern SchedulerBase]
+[extern SetAPICTimerCount]
 Isr240:
-       push 0
+       push 0  ; Line up with Argument in errors
+       push 0  ; CPU Number
+       ;xchg bx, bx    ; MAGIC BREAK
+Isr240.jmp:
+       %if USE_MP
+       jmp SetAPICTimerCount   ; This is reset once the bus speed has been calculated
+       %else
        jmp SchedulerBase
+       %endif
 ; - Assignable
 %assign i      0xF1
 %rep 16
@@ -206,13 +248,19 @@ Isr240:
 ; ---------------------
 [extern ErrorHandler]
 ErrorCommon:
-       ;xchg bx, bx
+       ;xchg bx, bx    ; MAGIC BREAK
+       
        pusha
        push ds
        push es
        push fs
        push gs
-       
+
+       ; Clear TF      
+;      pushf
+;      and WORD [esp], 0xFEFF
+;      popf
+
        mov ax, 0x10
        mov ds, ax
        mov es, ax
@@ -246,6 +294,18 @@ SyscallCommon:
        call SyscallHandler
        add esp, 4
        
+       ; Pass changes to TF on to the user
+       ; EFLAGS is stored at ESP[4+8+2+2]
+       ; 4 Segment Registers
+       ; 8 GPRs
+       ; 2 Error Code / Interrupt ID
+       ; 2 CS/EIP
+       pushf
+       pop eax
+       and eax, 0x100  ; 0x100 = Trace Flag
+       and WORD [esp+(4+8+2+2)*4], ~0x100      ; Clear
+       or DWORD [esp+(4+8+2+2)*4], eax ; Set for user
+       
        pop gs
        pop fs
        pop es
@@ -258,6 +318,9 @@ SyscallCommon:
 ; IRQ Handling
 ; ------------
 [extern IRQ_Handler]
+[global IRQCommon]
+[global IRQCommon_handled]
+IRQCommon_handled equ IRQCommon.handled
 IRQCommon:
        pusha
        push ds
@@ -273,6 +336,7 @@ IRQCommon:
        
        push esp
        call IRQ_Handler
+.handled:
        add esp, 4
        
        pop gs